Carbureting apparatus



(Oct. 1, 1 929. G. CAONSTAN'II'INEISCO A I 1,730,268

GARBURETING APPARATUS Filed Feb. 11, 1926 G Co 7.2 6 54/056 7e 36GO Patented Get. 1, 1929 GEORGE consrAN'rINEsoo, or wee e, ENGLAND CARIBURETING H mm s 7 Application filed February 11, 1926, Serial No. 87,665, and inGreat Britain April 9, 1925.

This invention consists in improvements designed to secure ease in machining the throttle, tightness of fit, diminution of wear, ease in assemblage and disassemblage and greater control of air admission than is possible with existing valves. It also consists in improved means for admitting fuel to the float chamber.

The improvements are chiefly applicable to the carburetor forming the subject matter of my United States application Serial No. 611,- 4:57, but it is to be understood that their application is not confined to any particular type of carburetor.

The throttle is square or rectangular in shape instead of circular or elliptic as is usual and, fits into the suction passage which is also square or rectangular in section at the part occupied by the throttle. It turns freely about a central pin parallel to two of its edges,

which pin is supported friction tight in bosses on the suction pipe. One of its edges may project beyond the suction inlet, and on this edge is fixed a socket for the reception of the g5 actuating means. It is designed .so as completely to close the inlet in either of its extreme positions. It may be divided into two parts longitudinally, a spring being interposed between the parts so as to press them 3.0 outwardly against the sides of the suction v i positions.

passag Preferably the fuel inlet into the suction passage is between the lines where the throttle meets the suction passage 1I1 1ts extreme When applied to the carburetor forming the subject matter of the above named prior application or to any other drip carburetor, the fuel inlet is immediately above and reaches down to the pin, the throttle being slightly out awa if necesary, so that the fuel inlet shall reach down as far as possible into the suction passage. As in my prior application the fuel inlet terminates in a small conical cup which is slit vertically for the escape of fuel, the slit being on the side of the cup nearest the engine. An advantage of this arrangement of inlet and throttle is that by depressing the accelerator pedal so that the throttle is moved beyond its-mean position,

the air supply can be throttled before .it reaches thefuel inlet. This -facilitates start'- ing in cold weather sinceit obviates the neces sity of artificial choking as'by the insertion of a rag or the like into the air inlet.

As in my'prior. application, "the fuel chamber is preferably situated immediately above the throttle, and is cast in one with thesuction pipe. The fuel inlet into the chamber is through the middle of the cover, and is controlled by a ball carried by a loose bridge piece which is raised or lowered by a pair of levers pivoted at their ends nearest to the, axis of the chamber. Their remoter endsare acted upon by the float. Alternatively, the valve may. be a cone having a tail piece or spindle resting on thefioat.

In the accompanymg drawings, which illustrate my invention 3 Figure 1v is a central vertical section through 'a carburetorand suction passage.

Figure 2 is a part section on the line 22 of Figure 1. r 5' Y Figure 3' is a section of the throttle on the line 3-3 of Figure 1.

Figure 4 is a modifiedjform tr carburetor and throttle. p Referring igures 1', 2 and 3, th'e suction passage 1 is rectangular in section, square in this-instance, the suction pipe itself being preferably cast in one piecewith the PAT T Price v carburetor float chamber. The throttle 2 turns upon a pin 3 which is a tight fit in the wall of the suction pipe. In. the form shownfit is divided longitudinally into two equal portions as shown in Figure 3, the portions being recessed to receive a spring 4- I which presses them apart. The portions have I each an eye or tail piece 5 which projects beyond the suction inlet and is adapted to re ceive a pin or other means, not shown, for 0 connecting themto the usual actuating device. The spring ensures a fit against the sides of the suction passage, If any leakage occurs it takes pla'ce through the division between the two portions of the valve and be comes carbureted, whereas leakage occurring at the sides of the valve islikely topass'the fuel inlet without taking up any fuel. Preferably as shown the fuel inlet is situated immediately above or nearly above the pin 3 and consists of a conical cup 6 slotted down the side nearest the engine and projecting down almost to the spindle. The two parts of the throttle are inthis case cut away as shown at 7 to make room for the cup. The advantage of this arrangement is that the throttle can be closed in either direction, so thatthe supply to the engine "can be choked eitl'i'er' after connected to said projecting edge of the throttle.

In testimony that I claim the foregoing as my invention, I have signed my name this 26th day of January 1926.

. GEORGE CONSTANTINESCO.

the air reaches the fuel inlet or before. ,The L ability to do this latter is of" great value for starting the engine from the coldin cold weather. 7 t

The carburetor is preferably of the. type, though not of the identical construction shown in my prior-application. 8 is a .drip' tube. 9 the float upon which rests the tail of a cone fuel valve 10.- 11 is a filter.- 1

Figure 4 shows a modified form of throttle and carburetor, likeparts being represented by the same reference numerals as before. 1 is the suction passage of rectangular section. 1 Thethrottle 2 is in this instance in one,

piece only and is provided with an eye 5 projecting beyond the entrance to the air inlet and adapted to receive actuating means which I is notshown. It is mounted on a pin 3, as

i by pins 16.

in the form abovedescribed, and is cut away in the middle as shown at 7 for the same purpose. It is shown in the position in which the air is choked before reaching the fuel inlet 6. The inlet valve in this case consists of a ball 12 carried by. a loose bridge piece .13 which rests on levers 14. .The tails of the levers bear on the float 9. They arepivoted at 15, and their downward motion is limited What I claim is a 1. In eombination ina carburetor, asuction passage of rectangular section, atransverse pin fixed .in thewalls of such passage, a rectangular throttle mounted at its substantial median line to turn freely on said pin,..one

edge of said throttle projecting beyond the inlet end of the suction passage, saidthrottle being divided longitudinally into two sections, a spring interposed between the sections to press them apart, and throttle oper-v ating edge. I V

2. In combination means connected to saidprojecting in a carburetor, a suctionpassage of rectangular section, a trans- 

